Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é a média de jogadores por jogo multiplayer na Europa?
 ###Tabelas: 
CREATE TABLE Games (GameID INT, GameType VARCHAR(255), Multiplayer INT); INSERT INTO Games (GameID, GameType, Multiplayer) VALUES (1, 'Racing', 0); INSERT INTO Games (GameID, GameType, Multiplayer) VALUES (2, 'Shooter', 1); CREATE TABLE Players (PlayerID INT, GameID INT); INSERT INTO Players (PlayerID, GameID) VALUES (1, 1); INSERT INTO Players (PlayerID, GameID) VALUES (1, 2); INSERT INTO Players (PlayerID, GameID) VALUES (2, 2); INSERT INTO Players (PlayerID, GameID) VALUES (3, 2); INSERT INTO Players (PlayerID, GameID) VALUES (4, 2); INSERT INTO Players (PlayerID, GameID) VALUES (5, 2); INSERT INTO Players (PlayerID, GameID) VALUES (6, 2); INSERT INTO Players (PlayerID, GameID) VALUES (7, 2); INSERT INTO Players (PlayerID, GameID) VALUES (8, 2); INSERT INTO Players (PlayerID, GameID) VALUES (9, 2); INSERT INTO Players (PlayerID, GameID) VALUES (10, 2);
SELECT AVG(CountPlayers) FROM (SELECT GameID, COUNT(PlayerID) AS CountPlayers FROM Players INNER JOIN Games ON Players.GameID = Games.GameID WHERE Games.Multiplayer = 1 GROUP BY GameID) AS Subquery WHERE EXISTS (SELECT GameID FROM Games WHERE ReleaseCountry LIKE '%Europe%' AND Games.GameID = Subquery.GameID);